Does my sister clean her teeth at eight o'clock?

Does my sister clean her teeth at eight or nine o'clock?

Does my sister clean her teeth or take a shower at eight o'clock?

Does my sister or my mother clean her teeth at eight o'clock?

When does my sister clean her teeth?

What does my sister do at eight o'clock?

What does my sister clean at eight o'clock?

Whose teeth does my sister clean at eight o'clock?

Who cleans their teeth at eight o'clock?

My sister cleans her teeth at eight o'clock, doesn't she?

Whose sister cleans her teeth at eight o'clock?

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